I'm trying to make a bell curve (normal gauss distribution). I have some problems regarding the probability density curve, since its values are so low. If you look column N in the attached file - I used the NORMDIST command. Values should be somewhere between 0,2 and 0,4 - but they're about 100x lower.
View 2 RepliesThere is trading system which generates a winning trade per ONE stock in ONE month’s time with a probability of 5/12 (0,4166%). If the system trades 10 independent stocks the probability of any number of winning trades occurring out of all of them in ONE month is shown below:
None 0,0046
One 0,0326
Two 0,1047
Three 0,1995
Four 0,2494
Five 0,2172
Six 0,1272
Seven 0,0519
Eight 0,0139
Nine 0,0022
Ten 0,0002
I took these values from a book…I tried to reproduce these values in the spreadsheet that I attached. My table looks as follows:
0 0,0046
1 0,0033
2 0,0023
3 0,0017
4 0,0012
5 0,0008
6 0,0006..........
I know EXCEL has functions for both the NORMAL DISTRIBUTION and the
cumulative value thereof...
but is it possible to graph this data..
(I imagine if I sort the data and then calculate the ***. distributions into
a column...then chart it, it should work; BUT IS THERE ANOTHER WAY?)
Say I measure the height of 1000 people and I have those in a column in excel. It should be a normal distribution with mean x and standard deviation y. How do I actually graph it so I can see the normal distrubution curve that looks something like this:
[url]
I tried making a scatter graph but it graphs them point by point. I want the height to be on the x axis and something like frequency on the y axis.
i have some number that i want to put in a normal distribution
so.. i have age ( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) and have the number of times that the kid wake in the night ( 10, 12, 9,11,8,9,7,9,11) and want to do the normal distribution grafic with that .
How to crate a chart for normal distribution for a set of datas. say marks of students/ number of students in a class
View 1 Replies View Relatedin VBA the RND function generates a random number using uniform distribution (every number is as likely as any other). Is there a function to generate a random number using normal distribution where the numbers closest to the mean are more likely to occure then numbers further away from the mean. I've created the following custom function to generate a random number between two given values using uniform distribution.
Function RandNum(Min As Double, Max As Double) As Double
RandNum = (Max - Min) * Rnd + Min
End Function
I would like to create a random number based on that data.
View 3 Replies View RelatedI saw one of my classmates do quick normal distribution by the click of a button and when I asked her she said she used VBA function of Excel.
This is what I would like to do: Have a macro/VBA in one excel file. And using that excel file do normal distribution for an excel file that's opened in another window.
I would like to generate a random value using a skewed normal distribution. For inputs I have the sample mean, standard deviation, and skewness. I would like to find a way to generate numbers randomly that would fit the skewed normal distribution described by the inputs.
Some information about skewed normal distributions can be found here: ...
I have weird alpha value like 14.385%, a sample size (36). What is the corresponding critical value for the normal distribution. There are questions like this dealing with the Student T dist, Chi Squared and F distribution. If i can figure out how to do it for one I can probably do it for all of them.
I would like to get random number generator for normal distribution and I’m using:
=NORMINV(RAND(),$B$1,$B$2)
Where B1 is mean (average) and B2 is SD.
This command works, but in the random generating numbers, I’m getting positive and negative numbers (ex. -23,34).
how to change command so I can generate positive only numbers?
I have two data sets one measured and one modelled and I am testing a conceptual model that proposes that only where the tails of the probability distributions of each data set crosses will you experience an event. I'm enclosing an example file which contains both data sets and some descriptive statistics as well as the associated histograms and a diagram of what I'm ultimately trying to achieve. My question is how I go from the data sets I have with such a large discrepancy between them to plotting their probability distributions?
View 5 Replies View RelatedThis is more of a probability question than Excel - but I know Excel has functions to work out the answer (and I was hopeless with probability maths at school so knowing which function to use is also a problem)
Here's the deal:
There are 43,000 tickets in a multiple draw lottery/raffle
There are 1,730 prizes available.
Each winning ticket is returned to the pool after being drawn, so in theory, one extremely lucky ticket holder could take home every prize.
However, what is the statistical probability (chance) of winning a single prize and what formulae/functions does one use to generate the answer?
I want to know if it's possible to calculate the probability that a certain range of values, reach to a certain point.....
The range is this (example):
4
3
9
7
14
22
15
20
42
46.....
What I want to know is if this tendency will reach to 1000. Or how many steps more will be need to reach 1000.
Like I said, and don't know if this is in the right place, but if you put this values in a graphic you will see that the tendency is growing. I assume that this tendency will reach to 1000. But will be in the next 10 steps or in the next 30.
=NORM.DIST(-0.7525,0,1,FALSE)=0.30057
I want to do inverse 0.30057 To get -0.7525 ,NORM.INV(0.30057,0,1) This function returns only cumulative distribution .
Lets say I have 20 cells. I want to randomly assign a label to the each cell from 5 choices, like "Blue", "Orange", "White", "Green", and "Black". But I want to assign a probability of selecting the labels. So the percent probability of choosing Blue would be 56% and White would be 23%, etc. . . is there a function that allows me to do this?
View 5 Replies View RelatedI need a probability distribution for amounts to be shipped taking into account both the probabilty distribution on parcel sizes (amounts to be shipped) per ship as well as the probabilities on the number of ships arriving.
Please see the following:
Say you have a probabilty distribution for ships arriving, i.e. the probabilty of 1 ship arriving in a specific time period= 0.25 ( event a), the probabilty of 2 ships arriving = 0.2 (event B) etc. Please take into account that this can go up to about 20 ships per time period.
Each ship can have one of four parcel sizes, (demand that needs to be met) (the following are just example probabilties)
0 tons with a probability of 0.67 event 1
1000 tons with a probabilty of 0.08 event 2
1500 tons with a probabilty of 0.222 event 3
2000 tons with a probabilty of 0.022 event 4
Thus event a has a probabilty of occuring, in event a, events 1to 4 can occur with their respective probabilties.
I assumed events 1 to 4 stay the same for all ships arriving (as we are dealing with multiple products, each product will have different parcel size distributions, however I look at products seperately, thus only one product is considered here)
This is simple for 1 or 2 ships, but as the number of ships increase the number of combinations become excessively large.
Should i use a macro that determines permutations/combinations? I am kind of clueless on this one.
If it helps to put the problem in context; I am trying to determine a demand distribution as input for a stochastic programming model
Can anyone help, I'm trying to create some test data, eg 1000 rows in excel. In each cell a formula (?) returns some text such as Dog, Cat or Rabbit based on the probability Dog=0.5, Cat=0.3, Rabbit=0.2
I've come up with a messy solution of generating a random number between 1-100 and then using a lookup table where 1-50 = dog etc... it works but is long winded and difficult for other people to follow.
1. I need to randomly generate either a 1, 6 or 12 every time I hit calculate (i.e. F9).
2. I want to specify the probablility of each result. For example, I want 12 to be the result 80% of the time, and 6 and 1 to be the result 10% of the time.
I have the following table:
http://img85.imageshack.us/i/tableb.jpg/
Each question is multiple choice (either A/B/C/D/E) and the values listed are the probability of each letter occurring. What formula would I need to put in the 'output' column for it in each row to output a letter based on the probabilities. E.g. in question 1, most of the time it would output E, but sometimes (rarely) A and very rarely B/C/D.
I keep reading that this "Application.Dialogs(xlDialogPrint).Show" brings up the same dialog as File-> Print or Cntrl+P but it does not.
Instead I get this wrong.jpg
When I actually need this correct.jpg
How to get the second one?
I have a value say £11.50 what i need is for this to be turn in to 1150 no point.
When i try on excel i get it to 115
I sometimes come across spreadsheets that have only a few white, "normal" looking cells and the rest are grey with no borders.
Usually there is a thick blue line around the "normal" cells and I can make more cells look "normal" by dragging the blue border line.
What is this? And, how do I set it up in a spreadsheet if I need to?
I am currently using Excel 2007 and I am trying to find a good working formula for Normal Hours worked:
I have the following code for Total Hours, Time and a Half and Double Time hours but I can't seem to get the right formula for working up to 8 hours.
Whereas C11 = Total hours added for the day.
=MOD(SUMPRODUCT(C8:C10-C7:C9),1) =Total Hours Worked
=Normal work hours between 0 to 8 hour work day.
=MIN("04:00",MAX(0,C11-"08:00")) =Time and a Half hours over 8 hours worked.
=MAX(0,C11-"12:00") =Double Time hours over 12 hours worked
What I mean by my "bold" underlines:
QRG5UUl.png
Notice the difference between the bold underline and the normal ones. There is also some weird thing happening where in some cells, when I use the underline feature, it shows as a bold underline, but once I've pressed enter to move on to another cell, the underline reverts back to normal. If I select to edit (F2 or double-clicking) said cell, the underline becomes bold, and vice versa (s3lw.png).
All this started happening immediately after I did this (was just experimenting, and I have no idea what this actually does, or if it was the cause of those occurences): Insert > Symbol > Special Characters > No-width optional break. I did that to just one cell though, and now all this weird stuff is happening.
I would like to create a histogram from experimental data with the normal distribution curve overlaying the histogram.
View 7 Replies View RelatedIs there a way to generate a normal curve from just the statistical values (mean, std dev, etc)? I used the NORMDIST function but have to manually do the x values and it generates what I would descirbe as a "sample" curve. I would like to make one based on user input.
View 5 Replies View RelatedI have been trying to type a date in a column in MS excel. But excel always reads it as a serial number.
How Can I get it to display the date as it is in date format. I have the next column formatted/ formulated to display the day of the date in the previous column.
I use the following code to assign a macro to right arrow key.
Application.OnKey "{RIGHT}", "myMACRO"
My questin is how to let the right arrow key resume its normal function, that is move from left to right (A2 to A1) if I do not want the macro any more and without quit and restart EXCEL? The following code disabes the right arrow key's normal function. Application.OnKey "{RIGHT}", ""